:root{
  --panel: rgba(12, 16, 22, 0.92);
  --panel2: rgba(18, 24, 34, 0.88);
  --stroke: rgba(255,255,255,0.10);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.55);
  --radius: 18px;
}

html, body { height: 100%; margin: 0; background: transparent; color: var(--text); font-family: ui-sans-serif, system-ui; }

#app{
  height: 100%;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, var(--panel2), var(--panel));
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  overflow: hidden;
}

#header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 14px 14px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(0,0,0,0.10);
}

.hdr-left{ display:flex; flex-direction:column; gap:3px; }
#siteTitle{ font-weight: 700; letter-spacing: 0.2px; font-size: 14px; }
#siteMeta{ font-size: 12px; color: var(--muted); }

.hdr-actions{
  display:flex;
  align-items:center;
  gap:8px;
}

#closeBtn,
#expandBtn{
  width: 34px; height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.85);
  cursor: pointer;
}
#closeBtn:hover,
#expandBtn:hover{ background: rgba(255,255,255,0.10); }

#messages{
  flex: 1;
  padding: 14px;
  overflow: auto;
}

.msg{
  max-width: 86%;
  margin: 8px 0;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(0,0,0,0.18);
  line-height: 1.35;
  font-size: 14px;
}
.msg.user{ margin-left:auto; background: rgba(255,255,255,0.08); }

.msg h1, .msg h2, .msg h3 {
  margin: 0 0 6px;
  line-height: 1.25;
}
.msg h1 { font-size: 18px; }
.msg h2 { font-size: 16px; }
.msg h3 { font-size: 15px; }
.msg p { margin: 0 0 6px; }
.msg ul { margin: 0 0 6px 18px; padding: 0; }
.msg li { margin: 0 0 4px; }
.msg a {
  color: #8dc8ff;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.msg code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 6px;
  padding: 1px 5px;
}

#inputRow{
  display:flex;
  align-items:flex-end;
  gap: 10px;
  padding: 12px;
  border-top: 1px solid rgba(255,255,255,0.06);
  background: rgba(0,0,0,0.10);
}

#input{
  flex: 1;
  min-height: 42px;
  max-height: 180px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(0,0,0,0.18);
  color: rgba(255,255,255,0.92);
  padding: 10px 12px;
  outline: none;
  resize: none;
  overflow-y: auto;
  font: inherit;
  line-height: 1.35;
}
#input::placeholder{ color: rgba(255,255,255,0.35); }

#sendBtn{
  height: 42px;
  min-width: 84px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.90);
  cursor:pointer;
}
#sendBtn:hover{ background: rgba(255,255,255,0.10); }

.icon-btn{
  height: 42px;
  min-width: 42px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.90);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}

.icon-btn:hover{ background: rgba(255,255,255,0.10); }

.voice-settings{
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 10px 12px 12px;
  background: rgba(0,0,0,0.10);
}

.voice-settings-row{
  display:flex;
  align-items:center;
  flex-wrap: wrap;
  gap:10px;
  margin-bottom:8px;
}

.voice-settings-row button{
  height: 32px;
  min-width: 90px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.90);
  cursor:pointer;
}

#voiceStatus{
  color: var(--muted);
  font-size: 12px;
}

.voice-settings-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.voice-settings-grid label{
  display:grid;
  gap:4px;
  color: var(--muted);
  font-size: 12px;
  min-width: 0;
}

.voice-settings-grid select{
  height: 32px;
  min-width: 0;
  width: 100%;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(0,0,0,0.20);
  color: rgba(255,255,255,0.92);
}

@media (max-width: 520px) {
  #inputRow {
    gap: 8px;
  }
  #sendBtn {
    min-width: 64px;
  }
  .voice-settings-grid {
    grid-template-columns: 1fr;
  }
}